If Bron does appear it may be not till towards the end, though he likely will appear in flashbacks perhaps. I'm not to crazy on how Bron was introduced. 9 movies with no mention of a father and the father never thought to look for his son in the Great Valley? It is one of the retcons, but if the movie is a good one I'll just say, for me, that it happens in a parallel universe, like an lbt earth 2, to use the pre crises dc terminology.